title: Reply by the authors.
authors.forename: Yong Seung
authors.initials: YS
authors.lastname: Lee
authors.forename: Hyeyoung
authors.initials: H
authors.lastname: Lee
authors.forename: Young Jae
authors.initials: YJ
authors.lastname: Im
authors.forename: Sang Won
authors.initials: SW
authors.lastname: Han
mesh_terms: D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000175:diagnosis*; D007682:Kidney Pelvis; D008297:Male; D014517:Ureteral Obstruction / Q000175:diagnosis*